TAIWAN SEMICONDUCTOR (TSM) VP adds 55 ESPP shares to large stake

Rhea-AI Filing Summary

TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD vice president Chue-San Yoo reported a small open-market-style purchase through the company’s Employee Stock Purchase Plan. An ESPP trust bought 55 common shares at $71.82 each on behalf of Yoo, bringing that ESPP holding to 6,486 shares.

After this update, Yoo’s reported holdings include 1,797,614 common shares held directly, plus indirect interests in 851,908 shares via Yuding Investment Co., Ltd., 219,924 shares held by a spouse, 7,036 shares in an LTI bonus plan trust, and 6,486 shares in the ESPP trust.

Insights

Equity compensation and insider-transactions analyst

Minor ESPP purchase modestly increases an already large TSM stake.

Vice president Chue-San Yoo had an ESPP trust acquire 55 common shares of TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD at $71.82 per share. Footnotes state the purchase followed terms predetermined under the Employee Stock Purchase Plan, indicating a routine, programmatic acquisition rather than discretionary trading.

Post-transaction, Yoo reports 1,797,614 common shares held directly and substantial indirect holdings via an investment company, spouse, and long-term incentive trust. The 55-share ESPP purchase is immaterial relative to this multi-million-share stake, so it does not meaningfully change overall exposure or signal a major shift in sentiment.

The filing also notes shares held under a Long-Term Incentive Bonus Plan trust where Yoo has obtained investment control, underscoring that a significant portion of exposure is tied to incentive and benefit programs. Subsequent company filings may further detail any future ESPP or LTI-related activity, but nothing here suggests a change in broader equity strategy.

Insider Trade Summary

Net Buyer: 55 shares ($3,950)

Net Buy 5 txns

Insider Yoo Chue-San

Role VP

Bought 55 shs ($4K)

Type	Security	Shares	Price	Value
Purchase	Common Shares (2330.TW)	55	$71.82	$4K
holding	Common Shares (2330.TW)	--	--	--
holding	Common Shares (2330.TW)	--	--	--
holding	Common Shares (2330.TW)	--	--	--
holding	Common Shares (2330.TW)	--	--	--

Holdings After Transaction: Common Shares (2330.TW) — 6,486 shares (Indirect, By ESPP Trust); Common Shares (2330.TW) — 1,797,614 shares (Direct, null)

Footnotes (1)

1. Common Shares purchased by the administrator of the issuer's Employee Stock Purchase Plan ("ESPP") on behalf of the filer pursuant to terms predetermined by the issuer. The price was translated from the average purchase price of NT$2,257.1777 in New Taiwan dollars, at the rate of NT$31.429 to US$1. Common Shares purchased and held under the issuer's Employee Stock Purchase Plan ("ESPP"). Represents Common Shares purchased by a trust with cash received under the issuer's Long-Term Incentive ("LTI") Bonus Plan, over which the filer has obtained investment control.

Key Figures

ESPP purchase: 55 shares Purchase price: $71.82 per share Direct holdings after: 1,797,614 shares +4 more

7 metrics

ESPP purchase 55 shares Common Shares (2330.TW) bought via ESPP trust on 2026-05-08

Purchase price $71.82 per share Average price paid by ESPP administrator

Direct holdings after 1,797,614 shares Common Shares (2330.TW) held directly after transactions

Yuding Investment stake 851,908 shares Indirect ownership via Yuding Investment Co., Ltd.

Spouse holdings 219,924 shares Indirect ownership through spouse

LTI trust holdings 7,036 shares Indirect ownership via Long-Term Incentive Bonus Plan trust

ESPP trust holdings after 6,486 shares Common shares held under ESPP after 55-share purchase

Key Terms

Employee Stock Purchase Plan ("ESPP"), Long-Term Incentive ("LTI") Bonus Plan, indirect ownership, open-market purchase

4 terms

Employee Stock Purchase Plan ("ESPP") financial

"Common Shares purchased by the administrator of the issuer's Employee Stock Purchase Plan ("ESPP") on behalf of the filer"

Long-Term Incentive ("LTI") Bonus Plan financial

"Represents Common Shares purchased by a trust with cash received under the issuer's Long-Term Incentive ("LTI") Bonus Plan"

indirect ownership financial

"direct_or_indirect": "I", "nature_of_ownership": "By ESPP Trust""

open-market purchase financial

"transaction_action": "open-market purchase", "transaction_code_description": "Purchase in open market or private transaction""

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Yoo Chue-San

(Last) (First) (Middle)

NO. 8, LI-HSIN ROAD 6

HSINCHU SCIENCE PARK

(Street)

HSINCHU TAIWAN 300096

(City) (State) (Zip)

TAIWAN

(Country)

2. Issuer Name and Ticker or Trading Symbol
TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD [ TSM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	VP

2a. Foreign Trading Symbol
[2330.TW]

3. Date of Earliest Transaction (Month/Day/Year)
05/08/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Shares (2330.TW)								1,797,614	D
Common Shares (2330.TW)	05/08/2026(1)		P	V	55	A	$71.82(2)	6,486(3)	I	By ESPP Trust
Common Shares (2330.TW)								7,036(4)	I	By LTI Trust
Common Shares (2330.TW)								219,924	I	By Spouse
Common Shares (2330.TW)								851,908	I	By Yuding Investment Co., Ltd.

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Common Shares purchased by the administrator of the issuer's Employee Stock Purchase Plan ("ESPP") on behalf of the filer pursuant to terms predetermined by the issuer.

2. The price was translated from the average purchase price of NT$2,257.1777 in New Taiwan dollars, at the rate of NT$31.429 to US$1.

3. Common Shares purchased and held under the issuer's Employee Stock Purchase Plan ("ESPP").

4. Represents Common Shares purchased by a trust with cash received under the issuer's Long-Term Incentive ("LTI") Bonus Plan, over which the filer has obtained investment control.

Remarks:

	/s/ Jen-Chau Huang, as attorney-in-fact	05/11/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did TSM VP Chue-San Yoo report in this Form 4?

Chue-San Yoo reported a small purchase of 55 common shares through an Employee Stock Purchase Plan trust at $71.82 per share. The shares were bought by the ESPP administrator under predetermined plan terms and added to existing ESPP holdings.

How many TSM shares does VP Chue-San Yoo hold after this filing?

After the reported transactions, Chue-San Yoo holds 1,797,614 common shares directly. Indirectly, there are 851,908 shares via Yuding Investment Co., Ltd., 219,924 through a spouse, 7,036 in an LTI trust, and 6,486 in an ESPP trust.

Was the TSM share purchase by Chue-San Yoo a routine ESPP transaction?

Yes. Footnotes state the 55 common shares were purchased by the Employee Stock Purchase Plan administrator on Yoo’s behalf pursuant to terms predetermined by the issuer, indicating a routine, program-based acquisition rather than a discretionary open-market trade.

What price did the ESPP trust pay for the TSM shares in this transaction?

The ESPP trust paid an average price of $71.82 per share for the 55 common shares. A footnote explains this price was translated from an average cost of NT$2,257.1777 using an exchange rate of NT$31.429 per US dollar.

How are TSM shares held for Chue-San Yoo under incentive and benefit plans?

Some TSM shares are held under structured plans. The filing shows 6,486 shares in an Employee Stock Purchase Plan trust and 7,036 shares held by a Long-Term Incentive Bonus Plan trust, where Yoo has obtained investment control according to the disclosed footnotes.

Does this TSM Form 4 show any insider share sales by Chue-San Yoo?

No insider sales are reported here. The summarized activity shows one buy-side transaction of 55 shares and four holding entries. The transaction summary lists 55 net buy shares, with zero shares categorized as sales in this filing.